A comparison of simulated unsaturated flow through waste rocks using two commonly used computer models

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Authors:Panda, Bibhuti B.; Freiman, Tony J.; Manepally, Chandrika
Author Affiliations:Primary:
AGRA Earth & Environment, Phoenix, AZ, United States
New Mexico Energy, Minerals and Natural Resources, United States
Arizona State University, United States
Volume Title:Proceedings of the 16th annual National meeting of the American Society for Surface Mining and Reclamation; Mining and reclamation for the next millennium
Volume Authors:Bengson, Stuart A., editor; Bland, Douglas M.
Source:location varies [Proceedings of the Annual National Meeting - American Society for Surface Mining and Reclamation, Vol.16(Vol. 2), p.527-539; 16th annual National meeting of the American Society for Surface Mining and Reclamation, Scottsdale, AZ, Aug. 13-19, 1999, edited by Stuart A. Bengson and Douglas M. Bland. Publisher: American Society for Surface Mining and Reclamation,], United States
Publication Date:1999
Note:In English. 21 refs.; illus., incl. 4 tables
Summary:A study was undertaken to examine the feasibility of using two computer programs (HELP and SoilCover) to model unsaturated flow through an inactive reclaimed tailing dam. The aim was to estimate the amount of flux at the bottom of the facility. The validity of the use of these models to analyze flow through reclaimed tailings and waste rock was examined. These two models were compared using similar geometry, climatological and hydraulic parameters. The theory of unsaturated flow for these two models and required input parameters are discussed. A sensitivity analysis of the various input parameters for the two models was performed to identify the important input parameters required for the unsaturated flow models. The study revealed that saturated hydraulic conductivity, Soil Conservation Service curve number and fraction of the area for surface runoff were the most influential parameters influencing the HELP model simulations, while the SoilCover model was most sensitive to the coefficient of volume compressibility.
Subjects:Boundary conditions; Compressibility; Computer programs; Dams; Discharge; Drainage; Evapotranspiration; Hydraulic conductivity; Models; Percolation; Pollutants; Pollution; Preferential flow; Sensitivity analysis; Tailings dams; HELP; UNSAT2
Record ID:2001047969
Copyright Information:GeoRef, Copyright 2018 American Geosciences Institute.
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